<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
   "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>Multiple IDs</title>
</head>

<body>
  <div id="multiple" class="foo"></div>
  <div id="multiple" class="bar"></div>
  
</body>
</html>